eeynolds



2 Sheets-Sheet 1.

Patented Jan.27,1891.

T. J. REYNOLDS. FIRE AND WATER TUBE BQILER.

(No Model.)

W mm 2% HOTU-HTHCL, WASHINGTON, u. c.

2 Sheets-Sheet 2.

{No Model.)

T. J. REYNOLDS. FIRE AND WATER TUBE BOILER.

No. 445,301. Patented Jan. 27, 1891.

III/Ill!!! NORNS PETERS (20., more-mac WASHINGT Nirnn rates a'rnrv'r rrtcn.

THOMAS J. REYNOLDS, OF BROOKLYN, NEW YORK, ASSIGNOR OF ONE-HALF TO FRANCIS NOLAN, OF SAME PLACE.

FIRE AND WATER TUBE BOILER.

SEEGIFICATION forming part of Letters Patent No. 445,301, dated January 27, 1891.

Application filed May 6, 1890. Serial No. 350,845. (No model.)

To aid whom it may concern.-

Be it known that I, THOMAS J. REYNOLDS, of Brooklyn, in the county of Kings and State of New York, have invented a certain new and useful Improvement in Fire and \Vater Tube Boilers, of which the following is a speci iication.

My invention relates to an improvement in boilers in which bot-h steam and water tubes are employed, the object being to provide a boiler which shall be simple in construction, and in which the heat shall be brought into contact with the water at intervals throughout the mass to produce a rapid generation of steam, and in which the parts shall be readily accessible for purposes of fastening and cleansing.

\Vith these ends in view my invention consists in certain features of construction and combinations of parts, as will be hereinafter described, and pointed out in the claims.

A practicable embodiment of my invention is represented in the accompanying drawings, in which Figure 1 is a vertical central section through the boiler and furnace. Fig. 2 is a horizontal section, and Fig. 3 is a partial vertical section, of the boiler, showing the central watertubes connected with a transverse tube-sheet at their upper ends.

A represents the outer casin g of the boiler, here shown of cylindrical form and intended to stand upright upon one of its ends. Centrally within the casing A there is located a tubular casing B, and the ends of the outer and inner casings A and B are secured together by headers O and D, the formerbeing located at the lower end and the latter at the upper end. Between the headers O and D ex- 0 tend series of fire-tubes, those nearer the outside of the boiler and represented byE being of greater diameter than those nearer the center and represented by c. In the present instance I have shown the fire-tubes E 6 arranged in 5 radial lines, and this form is convenient and preferable, though not essential, as the larger and smaller tubes might be arranged in staggered order and accomplish substantially the same results. It is, however, importantthat there should be left open spaces between the outer and inner casings at frequent intervals around the boiler, for reasons which will hereinafter appear.

From near the lower end of the inner cas ing 13 water-tubes F extend, at first a short distance within the space surrounded by the casing B, and then upwardly a short distance away from the wall of the casing B, and at their tops they enter the boiler portion again at a point preferably about two-thirds of the height of the boiler. In Fig. 1 the said tubes F are shown at their upper ends f as being turned outwardly and enter the boiler portion through the vertical wall of the inner casing 13, while in Fig. 3 the inner casing B is stopped short at the point where the watertubes F terminate, and is provided with an annular header (Z, in which the upper ends of the tubes F are secured, while an inner casing Z2 of less diameter than B projects from the header-d up to the header D as a continuation of the inner casing.

The fire-tubes E c and the space within the inner casing B and its lesser continued portion I) (when the construction is that shown in Fig. 3) form the passages for the products of combustion from the furnace from below. At the top of the boiler a dome G is formed for the reception of the products of combustion. From said dome the said products may be conducted, as is usual, to a suitable takeup. The boiler as thus constructed may be placed over a suitable furnace H, provided with a firecl1amber commensurate with the area of the bottom of the boiler.

Because of the increased diameter of the fire-tubes at the outside of the boiler, the escape of the products of combustion will be more freely permitted at that portion than atthe portion nearer the center, and hence will go tend to draw a portion of the more highlyheated products at the center of the fire-chamber off to the outside, and thereby equalize the degree of heat to which the water in the boiler is subjected, as well as afford a more extended heating-surface to the mass of water nearer the outside of the boiler. In order to check and regulate the draft within the inner casing B, a damper I may be provided at the upper end of the inner casing, so that the products of combustion which rise into the chamber formed within the said inner casing may be held in contact with the Water-tubes which project therein, forming, in effect, a combustion-chamber within the casing.

At the points in the outer casing A radially opposite the points in the inner casing B, where the water-tubes F are united with the inner casing, holes K are formed for convenience in constructing the boiler, permitting the ready insertion of the expandingtools, and also for convenience in washing the boiler out from time to time, as may be found desirable. The clear space left between the groups of tubes E c, hereinbefore referred to, is of importance for these purposes.

The water in the boiler is intended to be kept at a height above the upper ends of the water-tubes F, so that the steam which is rapidly generated therein by their contact with the heat in the combustion-chamber from the hottest part of the furnace will be delivered from their upper ends into the body of water and rise through it gradually into the steamdome, instead of being impelled directly'into the steam-dome. This rapid action within the tubes F also tends to produce a very rapid circulation of the water from the body of the boiler through the tubes F and back into the body of the boiler.

Boilers constructed in this mannermay be made of convenient sizes for steam-launches, large and small, and for the purpose of generating steam in general, and when made of a small size it will be found feasible to form both the outer and inner casings of seamless tubing.

It will further be observed that a boiler of this form requires but little space, and that in the smaller sizes thisfurnace may be made conveniently portable and the entire structure set up with great facility.

What I claim as my invention is- 1.. In a boiler, the combination, with an outer and an inner easing united by headers and leaving a central fire-space, of fire-tubes of different diameters leading directly from the fire-chamber and connecting the headers, the tubes of greater diameter being located nearer the outside of theboiler, substantially as set forth.

2. In a boiler, the combination, with an outer and an inner casing and headers connecting the two casings, leaving a Water-space between the casing and a fire-space within the inner casing, of water-tubes Within the inner casing and communicating at their upper and lower ends through the inner casing with the water-space, and fire-tubes connecting the headers and arranged in groups, leaving free space between the outer casing and the points where the said water=tubes connect with the inner casing,substantiallyas setforth.

3. In aboiler, the combination,with an outer casing and an inner casing and headers eonnectin g the two casings, leaving a Water-space between them,of water-tubes extending within the inner casing and communicating at their upper and lower ends with the Water portion of the boiler and fire-tubes connecting the headers, the said tire-tubes nearer the outer portion of the boiler being of greater diameter than those nearer the center, substantially as set forth.

4. The herein-described boiler, comprising an outer casing, an inner casing, headers connecting the two casings, leaving a water-space between them, upright fire-tubes of varying diameters connecting the headers, water-tubes within the inner casing and communicating with the water-space between the casings,and the damper at the upper end of the inner casing to regulate the draft therethrough, substantially as set forth.

THOMAS J. REYNOLDS.

lVitnesses:

FREDK. HAYNES, D. H. HAYWOOD. 

